Minerals & Gemstone 480x104
Minerals & Gemstone 480x104
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Glossary of Terms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ALL



Microcrystalline
Composed of tiny crystals that cannot be seen with an unaided eye. Microcrystalline minerals may appear massive or amorphous since no apparent crystal shape can be detected.



Chalcedony is a Microcrystalline Variety of Quartz



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